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TABLE 15 <br /> ESTIMATION OF AIR CONCENTRATIONS FOR VOCs IN SOILS <br /> MOUNTAIN HOUSE DEVELOPMENT SITE#6 <br /> Mountain House, San Joaquin County,California <br /> COPC Cs(mg/kg) 7 Ei(m /sec) Ca(mg/m3) <br /> BTEX <br /> Benzene 0.00050 1.5E-06 1.5E-08 <br /> Ethylbenzene 0.055 9.7E-05 9.8E-07 <br /> Xylene(s) 0.0010 1.7E-06 1.7E-08 <br /> PAHs <br /> Acenaphthene 0.47 3.2E-05 3.3E-07 <br /> Acenaphthylene 0.19 NA NA <br /> Anthracene 0.17 3.1E-06 3.2E-08 <br /> Benza(a)anthracene 0.21 NA NA <br /> Benzo(a)pyrene 0.041 NA NA <br /> Benzo(b)fluoranthene 0.052 NA NA <br /> Benzo(g,h,i)perylene 0.033 NA NA <br /> Benzo(k)fluoranthene 0.047 NA NA <br /> Chrysene 0.68 NA NA <br /> Dibenz(a,h)anthracene 0.034 NA NA <br /> Fluoranthene 0.079 NA NA <br /> Fluorene 0.66 2.3E-05 2.3E-07 <br /> Indeno(1,2,3-cd)pyrene 0.016 NA NA <br /> Naphthalene 0.33 6.9E-05 7.0E-07 <br /> Phenanthrene 4.0 NA NA <br /> Pyrene 0.27 NA NA <br /> Equation: <br /> Ca=Ei/99 <br /> Where: <br /> Ca=ambient air concentration,mg/m3 <br /> Ei=total emission rate for compound i(mg/second); <br /> Abbreviations: <br /> BTEX=Benzene,toluene,ethylbenzene,and total xylenes <br /> Cal/EPA=California Environmental Protection Agency <br /> COPC=Constituent of potential concern <br /> DTSC=Department of Toxic Substances Control <br /> mg/kg=Milligrams per kilogram <br /> mg/m'=Milligrams per cubic meter <br /> mg/sec=Milligrams per second <br /> NA=Not applicable because chemical is considered non-volatile(PEA Manual) <br /> PAHs=Polynuclear aromatic hydrocarbons <br /> PEA=Preliminary Endangerment Assessment <br /> VOCs=Volatile organic compounds <br /> Equation Source: <br /> PEA Manual,Figure 2.7 (Cal/EPA DTSC,June 1999). <br /> Page 1 of 1 From Science to so)V7lons <br />